Steelyard.



UNITED STATEtS lZ'lTENT OFFICE.

GEORG DARMSTAD'IER, OF DARMSTADT, GERMANY, ASSIGNOR TO THE FI RM QF CARL SCHENCK, EISENGIESSEREI & MASCHINENFABRIK, GESELLSCHAF'I MIT BESCHRANKTER I-IAF'IUNG, OF DARMSTADT, GERMANY.

STEELYARD.

Specification of Letters Patent.

Patented June '7, 1910.

Application filed June 17, 1909. Serial No. 502,681.

To all whom it may concern:

Be itknown that I, Gnono DARn LSTKDTER, engineer, a subject ofthe Grand Duke of Hesse, and a resident of Kasinostrasse 26, Darmstadt, German Empire, have invented certain new and useful Improvements in and Relating to Steelyards, of which the following description, in connection with the accompanying drawing, is a specification.

The present invention has for its object a locking device for steelyards, in which it is only possible to print the weight in the position of equilibrium.

Heretofore the weighing and the impres sion of the weight have been effected in the known manner by adjusting the sliding weight upon the beam by hand and then printing the weight in the position of equilibrium. With this arrangement, however, it is possible to take impressions of the weight even when the sliding weight is not arranged in the position of equilibrium. The weight given in this manner is therefore incorrect. By means of the apparatus hereinafter described and illustrated in the accompanying drawing, any such incorrect weighing is entirely prevented.

Figure 1 illustrates the device in side elevation. Figs. 2 and 3 are longitudinal sections, and Fig. 4 is a cross section.

The device consists of a steelyard a upon which the sliding weights 6 b are displaceably arranged. The steelyard a and the sliding weights 1 b are inelosed in a closed casing a so that it is impossible to bring the steelyard into the position of equilibrium unless the sliding wei hts likewise occupy this position. The sli ing weights 6 b are toothed on their lower side and on their upper side are provided with numerals indicating a scale of weights from which an impression of the Weight can be obtained by pressing against it a strip of cardboard or paper. Gear wheels 03 mesh with the teeth of the sliding weight; these Wheels are independent of each other and are operated from outside the casing 0 in such a manner that by rotating the shafts d which carry the gear wheels (Z, the several sliding weights can be displaced. The bearings of the shafts d of these gear wheels d are located on the bearing 7 of the steelyard a so that the ,play of the steelyard is not impeded by rotating the shafts. A slide 9 or .the like is provided on said hearing so that it can be displaced by hand, likewise from outside the casing. Inside the casing 0 the slide 9 carries two rails l1, and when it is displaced these rails engage in recesses in plates m fixed to the stcelyard (see Fig. 4E). The inter-engage ment of the slide it and the plates m on the steelyard a is only possible, however, when the steelyard is horizontal, that is to say when it occupies the position of equilibrium. By adjusting the slide 9 an opening 71 provided in the bearing of the steelyard is exposed; this opening serves for the insertion of a weight card it". This card can be printed by means of a plunger Z, operated by a lever Z arranged outside the casing e and on the fixed bearing f. As shown in Figs. 2 and 3 the scales, that is to say the upper face of the sliding weights 6 I), present recesses in which the rails h h engage in the same manner as in the plates m on the steelyard a (Fig. 4), the object being to prevent displacement of the scales or sliding weights when the weight card has been inserted in the slot 71 but the weight has not yet been printed upon it.

This apparatus is used in the following manner: In the first place the sliding weights 7) b b are arranged in succession in the position of equilibrium. When the position of equilibrium has been reached, the slide 9 can be displaced, the slot 2' thereby exposed and the weight card inserted and printed.

Having now particularly described and ascontrolled by the beam for liberating the controlled by the beam for liberating the 10 Weight and interlocking the Weight With the Weight andrinterlocking the beam and Weight gate when the beam is balanced. with the gate when the beam is balanced.

2. A device of the character described, n st nony, whe eof I have affixed my comprising a scale beam, a Weight slidable s g m ur 1 p e ence Of tWO wltnesses. thereon, an inclosing casing having an aper- GEORG DARMSTADTER, ture, a gate controlling said aperture, means Witn controlled by the beam for locking the gate JEAN GRUND,

when the beam is unbalanced, and means CARL GRUND. 

